LENGTH SCALES OF REMOTELY SENSED VEGETATION, SURFACE RADIOMETRIC TEMPERATURE, AND DERIVED SURFACE ENERGY FLUXES

摘要

The interaction between length scales in vegetation and temperature with the partitioning of surface energy fluxes is examined. These interactions are important for assessing the feasibility of incorporating satellite estimates of controlling biophysical variables into regional meteorological and climatological models.Horizontal length scales are computed via wavelet multiresolution analysis for remotely sensed fractional vegetation (Gillies and Carlson, 1995) and radiometric temperature at two different resolutions collected during the Southern Great Plains 1997 (SGP97) Hydrology Experiment. The first resolution is airborne Thermal Infrared Multispectral Scanner (TIMS) temperature and Thematic Mapper Simulator (TMS) fractional vegetation (Fr) at 12 meter pixel resolution. The second resolution is from the Advanced Very High Resolution Radiometer (AVHRR) with approximately 1000 meter pixel resolution.